Tonfunk Systementwicklung und Service GmbH

Any device whose MAC address begins with DC:DB:70 has a network interface built by Tonfunk Systementwicklung und Service GmbH. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

DC:DB:70

Organization

Tonfunk Systementwicklung und Service GmbH

Address

Anger20 Falkenstein / Harz OT Ermsleben Sachsen-Anhalt DE 06463

Source

IEEE OUI registry

Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.